Datasheet

MAX1407/MAX1408/MAX1409/MAX1414
Low-Power, 16-Bit Multichannel DAS with
Internal Reference,10-Bit DACs, and RTC
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M_HR: Alarm mask bit. A logic 1 masks out the hour
alarm comparator.
12/24: 12/24-hour mode bit. A logic 1 selects 12-hour
mode while a logic 0 selects 24-hour mode. This bit
must be the same as the 12/24-bit of the RTC_Hour
register for correct operation.
AP: AM/PM bit. In 12-hour mode, a logic 1 indicates
PM and a logic 0 indicates AM. In 24-hour mode, this
bit is the second 10-hour bit (20 hours).
10HR: This is the 10-hour bit (0–10 hours) of the alarm.
HR[3:0]: These are the hour bits (0–9 hours) of the
alarm.
FIRST BIT (MSB) (LSB)
NAME M_HR 12/24 AP 10HR HR3 HR2 HR1 HR0
DEFAULT 0 0 000000
AL_HOUR REGISTER (01011)
M_DAY: Alarm mask bit. A logic 1 masks out the day
alarm comparator.
DAY[2:0]: These are the day of the week bits (Sunday
–Saturday). The following table is the Hex code for
each day of the week.
ALIRQ: Alarm Interrupt Request Bit. A logic 1 indicates
that the current time has matched the preset time in the
alarm registers (this corresponds to the assertion of the
INT pin). ALIRQ resets to 0 when any alarm register is
read or written to.
FIRST BIT (MSB) (LSB)
NAME M_DAY ————DAY2 DAY1 DAY0
DEFAULT 0 0 0 0 0 0 0 1
AL_DAY REGISTER (01100)
AL_DAY SUN MON TUE WED THU FRI SAT
DAY[2:0] 1h 2h 3h 4h 5h 6h 7h
FIRST BIT (MSB) (LSB)
NAME ALIRQ ———————
DEFAULT 0 0 0 0 0 0 0 0
AL_STATUS REGISTER (01101)